Effects of Collisions
• Stars pass “through” each other, but orbits around galaxy disrupted
• Gas clouds collide
– Gas stripped away from stars
– Collisions cause bursts of star formation
• Ellipticals may be those galaxies which have suffered collisions
• Spirals may be those galaxies which have not suffered collisions
• Joshua Barnes (Hawaii) and the Space Telescope Science Institude
provide a simulation of the Antenna Galaxies:
http://imgsrc.stsci.edu/op/pubinfo/pr/1997/34/images/anima.mov